DE3119805A1 - Horizontal diaphragm pump with hydraulically positively driven, spring-loaded diaphragm valves - Google Patents

Abstract

Since diaphragm pumps of conventional design, whether driven mechanically or hydraulically, are suitable only for delivering clean liquids, as they are equipped with globe valves for controlling the intake and discharge stream, the horizontal diaphragm pump having hydraulically positively driven diaphragm valves has been conceived for the delivery of contaminated liquids, muds and pastes. In the essential part of the invention - the diaphragm valves - the throughflow ducts in the valve body are sealed by an elastic diaphragm which is loaded, on its rear side, by a pressurised hydraulic chamber, so that any contaminants carried along with the pumped liquid can be enclosed by the elastic diaphragm, the diaphragm valves therefore remain pressure-tight in all cases. The pressure present in the hydraulic chamber is generated via an elastic diaphragm which seals the hydraulic chamber at its underside, by a spring of arbitrary design acting on such a diaphragm. The tension valve spring is pushed back, in order to open the diaphragm valve, by an eccentric cam fixed on the pump shaft, so that the valve is open over an angle of rotation of approximately 160 DEG .

Description

Horizontal diaphragm pump with hydraulically controlled,

spring-loaded diaphragm valves.

The invention relates to a horizontal diaphragm pump as a conveying and Dosing pump, which is particularly suitable for contaminated liquids, sludge and to promote thick matter; and those according to the system of human peristalsis is working. Even liquids with high solids content in the form of lumps, Lumps or granules can still be conveyed with this diaphragm pump.

Pumps for pumping contaminated liquids and sludge, are screw and eccentric screw pumps, as well as various types of piston pumps.

These pumps are generally good for pumping thick matter suitable, however, have significant disadvantages in terms of their durability as well thus to demonstrate economic efficiency.

The Exz sub-worm or poppy pump, which is used for this purpose can be called as the most suitable, because of their high internal tends Friction, in some cases self-destructive, because of the elastomer body heat dissipation is not guaranteed from the pump stator.

A high drive power is also required for this pump, around the worm rotor, which is firmly clamped in the elastomer stator for reasons of tightness, to make it rotate in the first place. Therefore, the Mohno pump is not track-safe and is subject to high when pumping liquids with high solids content Wear and tear.

The worm pump is better in its durability, but in the overall efficiency rather worse, since it is not able to build up higher pressures.

Diaphragm and piston diaphragm pumps are positive displacement pumps, Although well suited, valves need in the suction and pressure lines. These Valves are the most vulnerable part of a diaphragm pump. You lose the least Contamination, or minimal wear, immediately function as shut-off devices. For pumping media with high solids content or high viscosity, are these Horizontal diaphragm pump with hydraulically controlled, spring-loaded diaphragm valves.

Pumps cannot be used at all.

There is therefore the task of creating a pump which is superior to these existing designs.

The pump to be created should and also be absolutely dry-running fully comply with the regulations for the protection of the environment. In no case may it The pumped medium can escape from the pump into the environment.

In accordance with the requirements for energy saving, the pump should can be operated safely and with a minimum of energy consumption can.

The invention is a pump which is able to contaminate To convey liquids, sludge and thick matter. A satisfactory shelf life against abrasive and corrosive media and build up high pumping pressures can. You should be in any position of the drive shaft of the pump, both be absolutely tight on both the pressure and the suction side. The pump should give by their design, the use of check valves and pressure holding valves, in the connection lines.

This pump should also provide an overpressure above the permissible delivery pressure automatically, without any additional regulating device. You should be able to be, in a relatively evacuated room, container or apparatus, convey medium in a dosed manner to be able to.

Appropriate design measures prevent the diaphragm from breaking, or any other circumstances, the pumped liquid escapes into the environment can.

Essentially, the invention consists in principle of the mechanical-constructive Replication of the peristaltic conveying movement in human food digestion, using a hydraulically operated diaphragm pump.

The conveying movement is achieved in this pump in that a plate-shaped elastomer membrane from a hydraulic fluid, horizontally and is moved away. This movement of the hydraulic fluid is controlled by an all around sing- Horizontal diaphragm pump with hydraulically controlled, spring-loaded diaphragm valves.

tensioned elastomeric membrane is generated, which via a crank drive, or crank drive train, moved up and down by the drive shaft of the pump will.

The delivery and hydraulic diaphragms are clamped against each other in a pressure-tight manner.

This constructive measure has the effect that if the conveyor is destroyed or hydraulic diaphragm, there is no longer any pumping action. The liquid to be conveyed but cannot escape from the pump.

The valves required to control the pumping process on the The suction and pressure side of the conveyor diaphragm are designed in such a way that an elastic Diaphragm, which with a defined pressure via a spring-loaded hydraulic fluid, presses against the openings of the delivery connections and seals these openings pressure-tight.

The opening of the elastic valve membrane is controlled by one on the Drive shaft of the pump made directly attached, rotating eccentric.

This eccentric suddenly loads the spring that holds the hydraulic fluid biases; and at the same time pulls over a fixed mechanical connection, the hydraulic membrane on.

The valve diaphragm is operated simultaneously via the hydraulic fluid dragged along. The openings of the delivery connections are thus released.

The area ratio of the hydraulic membrane to the opening area of the Conveyor connections result in the opening height of the valve diaphragm and thus the required passage cross-section according to the nominal connection size and the conveying speed.

Due to the arrangement of the eccentrics on the drive shaft of the pump opposite to. Shifted around 1800, the valve diaphragms are in every position the pump shaft remain tight. At least one valve is completely closed in each case.

The pump remains back pressure-tight because the eccentric is only in one Rotation angles equal to or less than 800 are effective.

The flow rate of the pump is pulsating. Since the speed of the horizontal Diaphragm pump with hydraulically controlled, spring-loaded diaphragm valves.

However, the pump's drive shaft runs at 200 to 300 revolutions per minute the pulsation has only a slight effect on the flow rate.

Due to this speed, which is relatively high for a diaphragm pump, there is a saving in construction dimensions in relation to the performance. That means a saving of high quality and expensive materials.

In addition, due to the higher speed, the use of geared motors with lower speed reduction, and thus a lower financial investment enables.

Based on the figures, an embodiment of the pump is shown in FIG the invention explained in more detail.

Figure sheet 1 is a vertical longitudinal section through the pump according to the invention.

Figure sheet 2 is a section through a suction or pressure valve the pump, according to the invention.

Figure Sheet 3 is a view of the valve diaphragm retaining plate the pump according to the invention.

Figure sheet 4 is a section through the valve diaphragm of the pump according to the invention.

Figure sheet 5 is the bottom view of the valve connection cover the pump according to the invention.

Formation Sheet 6 is a section and a view of the valve connector cap the pump according to the invention, in another embodiment.

Mainly the pump according to the invention consists of the hydraulic driven Xembrane pump unit. and the mechanical-hydraulic spring-loaded, preloaded suction and pressure valves, which are positively controlled via the drive shaft will. These valves are used for the inlet and outlet of the pumped liquid in or from the membrane pump unit. They become rotating at precisely defined angles of the crank mechanism of the membrane pump unit, controlled by the same drive shaft. horizontal Diaphragm pump with hydraulically controlled, spring-loaded diaphragm valves.

ert. These diaphragm valves are the essential part of the invention. You make the use of a hydraulically-mechanically driven diaphragm pump for conveying liquids and thick matter loaded with solids only in possible to the full extent.

In the embodiment shown in the figure on sheet 1, According to the invention, the pump has a suction port (31) through which the pumped liquid via the suction pipe (1) into the connecting pipe (2) through the valve eccentric (19.1) open valve is sucked into the pump head (29). The hydraulic membrane is located here (33) and the conveyor diaphragm (34), driven by the crank eccentric (30), in the lower, the suction position.

The opening angle of the valve eccentric (19.1) is based on the Angle of rotation of the drive shaft (20) of 3600, to an angle of less than or equal to 800 adjusted.

If the drive shaft (20) continues to turn with the crank eccentric (30) the suction valve closes via spring force and the pressure valve opens via the valve eccentric (19) so that the pumped medium is in the upper pressure position of the hydraulic diaphragm (33) and the pumping diaphragm (34), via the connecting pipe (2) into the pressure pipe (1) passes through the pressure port (32) and the subsequent pipeline.

The suction and pressure valves are completely identical. The position of the Valve eccentric (19) and (119.1) to each other is 1800.

The position of the pump eccentric (30) in relation to the valve eccentrics (19) and (19.1) each lies at an angle of exactly 1800.

For permanent lubrication of the moving mechanical parts of the pump, the drive housing of the pump is provided with an oil filling (35).

Figure sheet 2 shows a section through the diaphragm valve of the Pump, according to the invention, which consists of the valve cover plate (1.1) with the connecting pipes: Suction pipe (1), the connecting pipe (2), the hydraulic housing (5) and the between two all-round clamped valve diaphragms (3) with their horizontal Diaphragm pump with hydraulically controlled, spring-loaded diaphragm valves.

tall core (4). Between the hydraulic housing (5) and the retaining plate (13), the hydraulic membrane (7) is pressure-tight, clamped all around. The space between Valve diaphragm (3) and hydraulic diaphragm (7) is with a hydraulic fluid filled gas-free. (10). This space becomes pressure-tight with the screw plug (11) locked. The screw plug (11) also serves as a filling and venting screw for filling the hydraulic fluid (10).

To relieve the elastic material of the hydraulic membrane (7), from the working pressure of the hydraulic fluid (10) are pressure washers on both sides (6) and (8) arranged.

The pressure-tight closing of the valve membrane (3) is achieved by tension the spring package (12) - plate or coil spring - which is on the valve rod (1.2.1) is performed.

The spring tension is achieved via the spring tensioning bridge (15) by means of screw nuts (14) on the screw bolt (9).

The spring force thus generated is applied to the thrust washer (6) and the Transfer hydraulic membrane (7). The hydraulic membrane (7) transfers the spring pressure on the hydraulic fluid (10) and this acts on the valve membrane (3) as a closing force. Via the pulling device consisting of a drawbridge (16) with the adjustable Lag screws (17), the guide bridge (24), the guide bolt (25) and the guide flange (26), the diaphragm valve is opened by turning the drive shaft (20) using the valve eccentric (19) and the roller bearing (18) located thereon.

The spring-loaded bridge (21) is used to avoid noise and is constantly on the roller bearing (18) via the helical spring (22). The elastic Pad (23) also serves to reduce noise. The sealing of the connecting pipe (2) against the membrane pump unit with the pump head (29) takes place with the in the connecting flange embedded, elastic round cord ring (28). Both suction and pressure side.

The guide flange (26) is attached to the drive housing (27).

Horizontal diaphragm pump with hydraulically force-controlled, spring-loaded Diaphragm valves.

Figure sheet 3 shows the embodiment of a retaining plate (5) the valve membrane (3), the pump according to the invention. The passage opening (5.1) for the pumped medium, with the rounded edge (5.2), is half that Nominal size of the pipe connections of the pump corresponding to the radius (5.6) and the Center point distance (5.5) designed as an elongated hole.

The edge flange (5.3) is used to fix the valve membrane (3) the correct position of the retaining plate (5).

In the figure sheet 4 is an embodiment of a valve membrane the pump according to the invention, shown as a section. The valve membrane (3) with a metal core (4), which is inserted into the elastomeric materials of the valve diaphragm (3) vulcanized or glued in. The outline of the vault (3.2) of the metal core (4) corresponds to the outline of the passage opening (5.1) of the holding plate (5). The metal core (4) can also be made of another material, such as plastic or another, harder material Be elastomer.

The round holes (3.1) are for clamping the valve membrane (3) intended.

Figure on sheet 5 with the bottom view of the valve connection cover the pump according to the invention shows the connecting pipe (2) with its connecting flange, the suction or pressure pipe (1) with flange and the valve cover (1.1) with the holes (1.2) for supporting the valve diaphragm (3) at high delivery pressures.

Figure sheet 6 shows a section through the valve connection cover and a view according to the invention, in a different embodiment. Here are the bores (1.2) for supporting the valve membrane (3) in an almost straight line from the connecting pipe (2) to the suction (pressure pipe) (1) has been led to the promotion of liquids with a very high level of contamination by pesticides.

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Claims (4)

Horizontal diaphragm pump with hydraulically force-controlled, spring-loaded Diaphragm valves. Patent claims. ¼. Horizontal diaphragm pump with hydraulically force-controlled, spring-loaded Diaphragm valves, characterized in that the diaphragm pump unit with mechanical-hydraulic Drive, in cooperation with the hydraulically positively controlled, spring-loaded Diaphragm valves, in a horizontal arrangement, contaminated, loaded with solids Liquids and thick matter. With high viscosity promotes. 2. Horizontal diaphragm pump with hydraulically force-controlled, spring-loaded Diaphragm valves characterized in that the spring force over a hydraulic Liquid on an elastic valve diaphragm closing diaphragm valves, from the drive shaft of the pump are positively controlled and a pressure adjustable safety function take in. 3. Horizontal diaphragm pump with hydraulically controlled, spring-loaded Diaphragm valves, characterized in that the hydraulically acting diaphragm valves, in plate form, made of elastic material, provided with a membrane core made of Metal, plastic, or another elastomer, vulcanized or glued in, the deflection of the membrane over the through openings of the Valve body diminishes or cancels. 4th Horizontal diaphragm pump with hydraulically force-controlled, spring-loaded Diaphragm valves, characterized in that the hydraulically spring-loaded diaphragm valves, in conjunction with any type of diaphragm or piston pump, including vertical ones Arrangement, positively controlled by the drive shaft of the pump, independent of its position Are able to perform control and safety functions.